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INCOME TAXES
6 Months Ended
Jun. 30, 2013
INCOME TAXES [Abstract]  
INCOME TAXES
8.INCOME TAXES

The Company's worldwide effective tax rate was 19.0% and 16.2%, and 19.0% and 15.9% for the three and six months ended June 30, 2013 and 2012, respectively. The increase in the Company's worldwide effective tax rate in the three and six months ended June 30, 2013, as compared to the corresponding periods of 2012, was primarily due to a higher portion of the Company's pre-tax profits attributable to its U.S. tax jurisdiction as a result of an acquisition completed in the second half of 2012; and (b) a relative shift in offshore services performed in Belarus, where the Company is currently entitled to a 100% exemption from Belarusian income tax, to Ukraine, and, to a lesser extent, Russia, both of which have higher income tax rates.